I have used my 12v milwaukee batterys for not only my Marcum but also my shanty lights. I have 4 of them and they are super easy to charge as I have 2 chargers. They are marked +/- on the top. Use regular spade terminals and they plug right in.

Tim, it depends on how the battery is built. Some lithium batteries have a built in controller so all it needs is a regular 12 volt charger. Some do not have the controller built in so you need a controlled charger for that specific sized battery. Drill batteries need that brands particular charger. I don't know about Dakota's. But I think they have a controller in it.

For those of you trying out your drill batteries, check out buck converters or Amazon, or also look up dc-dc converters. I've got one marcum running with a Hodge podged converter using spade terminals slide into the battery + and - ports. Works fine. Spent 20 hours outside in negative temps and didn't even use close to half of the battery. On my other marcum I did up a little cleaner. Same principle as the Milwaukee m18 power source mentioned in other comments. But I used a knock off unit that was only $18 instead of $40. I added a $0.70 buck converter the size of my thumb nail. Had to drill a hold for my wires to come out and bolted the whole unit to the marcum carrier. Battery slides in top load style. And my 9ah batter will run it for days as well as be available to be used to drill holes. I'd post photos but I don't feel like going out to the truck. But anyone want more info or pics I would be happy to post it later. Bacon